Motrin (ibuprofen) is taken by mouth with a glass of water, ideally with food to protect your stomach. For most adults treating everyday pain, the standard dose is 200 to 400 mg every four to six hours as needed, with a firm ceiling of 1,200 mg in 24 hours when using over-the-counter strength.
Standard Adult Dosing
Over-the-counter Motrin comes in 200 mg tablets. For general aches, headaches, or mild to moderate pain, you can take one to two tablets (200 to 400 mg) every four to six hours. For menstrual cramps, the effective dose is 400 mg every four hours as needed. In either case, do not exceed three tablets (600 mg) per dose or six tablets (1,200 mg) in a 24-hour period unless a doctor has specifically told you otherwise.
Prescription-strength ibuprofen goes higher. For conditions like osteoarthritis or rheumatoid arthritis, doctors may prescribe up to 3,200 mg per day split into three or four doses. That range is only appropriate under medical supervision, not for self-treatment.
Taking It With Food
Motrin can irritate the lining of your stomach and intestines, especially with repeated use. Taking it with a meal, a snack, or even a glass of milk reduces the chance of nausea, heartburn, and stomach pain. If you need the fastest possible relief, taking it on an empty stomach will let it absorb more quickly, but this comes with a higher likelihood of GI discomfort. For most situations, the tradeoff isn’t worth it.
Swallow the tablet whole with a full glass of water. Don’t crush or chew it unless the packaging specifically says you can. Staying upright for at least 10 minutes after taking the dose helps the tablet move into your stomach rather than sitting in your esophagus.
How Long You Can Take It
For self-treated pain, don’t use Motrin for more than 10 consecutive days. For fever, the limit is three consecutive days. If your symptoms haven’t improved by then, something else is going on and you need a different approach. Long-term daily use raises the risk of stomach ulcers, kidney problems, and cardiovascular events, so it’s not designed to be a maintenance medication without medical oversight.
How Motrin Works
Your body produces chemicals called prostaglandins at the site of injury or inflammation. These chemicals trigger pain signals, swelling, and fever. Motrin blocks the enzymes responsible for making prostaglandins, which is why it works as a painkiller, fever reducer, and anti-inflammatory all at once. Relief typically starts within 20 to 30 minutes and lasts four to six hours.
Children’s Dosing
Children’s Motrin is dosed by weight, not age. If you know your child’s weight, use that to pick the correct amount from the dosing chart on the package. Age is a backup if you don’t have a recent weight. The dosing interval for children is every six to eight hours, which is slightly longer than for adults.
Motrin is not considered safe for babies under six months old. The FDA has not approved its use in that age group, so don’t give it to a young infant unless their pediatrician has specifically directed you to.
Who Should Avoid Motrin
People with existing heart disease need to be cautious. Ibuprofen and similar anti-inflammatory drugs can slightly increase the risk of heart attack, stroke, heart failure, and irregular heart rhythms. For people without cardiovascular disease, that added risk is very small: roughly one to two extra cardiovascular events per 1,000 people taking these drugs. But for someone who already has heart problems, the risk becomes more meaningful, particularly at higher doses or with long-term use.
Anyone taking blood thinners, whether antiplatelet drugs like aspirin or anticoagulants like warfarin, should be especially careful. Motrin affects how platelets work and can interfere with normal clotting. Combining it with a blood thinner raises the risk of bleeding, particularly in the digestive tract. Keep in mind that ibuprofen also hides inside combination products like Advil PM, so check labels to avoid accidentally doubling up.
If you’re pregnant, the FDA warns against using Motrin from 20 weeks onward. At that stage, it can cause kidney problems in the developing baby, leading to dangerously low amniotic fluid levels. After 30 weeks, the risks increase further because the drug can cause premature closure of a critical blood vessel in the fetal heart. Earlier in pregnancy, short-term use may be acceptable, but this is a conversation to have with your provider rather than a decision to make on your own.
Signs You’ve Taken Too Much
An ibuprofen overdose can affect multiple systems at once. Early warning signs include severe stomach pain, nausea, and vomiting. More serious symptoms include ringing in the ears, blurred vision, confusion, difficulty breathing, and very little urine output. In severe cases, seizures and loss of consciousness can occur. If you suspect an overdose, call 911 or the Poison Help hotline at 1-800-222-1222.
Common Interactions to Watch For
Beyond blood thinners, be aware that many over-the-counter cold, flu, and indigestion products contain hidden NSAIDs or aspirin. Alka-Seltzer contains aspirin. Pepto-Bismol and Kaopectate contain a compound related to aspirin. Excedrin also contains aspirin. Taking any of these alongside Motrin means you’re stacking anti-inflammatory drugs without realizing it, which multiplies the risk of stomach bleeding and other side effects. Always read the active ingredients panel before combining anything with Motrin.